You can see the list of customizable hot keys by holding the
Ctrl+H keys, but video speed isn't an option. If you have to adjust the speed of several clips, doing them one after the other will leave the Power Tools window open, and it's only two clicks for
Video Speed >
Speed Adjustment for each clip after the first one.
In newer versions, like PD18/365, it's just 2 steps to get straight to the Video Speed Designer window:
Tools >
Video Speed